Dump truck



July 18, 1950 s. M. BUYE ETAL 2,515,334

DUMP TRUCK Filed Sept. 25, 1948 3 Sheets-Sheet l INVENTORS 725.01 106/ .3 *iQflmzgw 13% T lk QM/- 4%W y 1950 s. M. BUYE ETAL 2,515,334

DUMP TRUCK I 3 Sheets-Sheet 3 Filed Sept. 25. 1948 INVENTORS Patented July 18, 1950 Stanley Buye and Frank M. ORourke, Eli-y, Wis.

Y Application September 25, 1948, Serial No. 51,168

Thi invention relates to dump trucks. Many forms of dump trucks have been proposed in the past. In one type, which has been manufactured extensively, the body or hopper is raised at the front end to slide the contents from the open rear end of the truck. A rather complicated elevating mechanism has been required in order to raise the front end high enough to dump the load with certainty. Heavy loads, such as rock, falling from such heights do great damage to'receiving hopper or feeders. A heavy truck structure has been required because the movable. body had'to be strong enough'to support the entire load to be dumped. v

Anobject of thepresent invention is to provide a practical and dependable truck with less excess body weight. The weight of the load is carried mainly by the fixed portion of the truck. The load is dumped from the level of the loadcarrying floor by sliding rearwardly the sides and front end of the body. thus sliding the load from the floor, which remains stationary. The weight of truck structure required is not much greater than would be required fora non-dumping truck. A simple but dependable'mechanism is provided for moving the movable parts of the body'and for supporting it in its extended position.

Another object of the" present invention is to providea" practical truck from which different materials, such 'as "gravel or limestone, maybe spread evenly behind the truck as the truck moves, and to'this end to provide a single truck body. inwhich the rate of discharge is uniform and controllablewithout reliance on the restricted opening of a tailgate.

Additional objects and advantages of the invention will be apparent from'the' following description and from'the accompanying drawings taken approximately on theline' 3- -3 ofFi 4. Fig.4 is a side view showing .parti'cularlythe dumping mechanism with the truck bodyin loadcarrying position. y.

Fig. 5 is a corresponding-view. showing the truck body in load-dumping position; f;

i 6 i a frame r s c mialwiwtak armament th indfifilo fi e- 8 Claims. (01. 214 s 2) Fig. 7 is a fragmentary sectional view taken approximately on the line of Fig. 4.

Fig. 8 is a diagrammatic perspective View showing the dumping and return mechanism, the

-drive therefor, and the control means for'the drive. v

Although the law requires a full and exact description of at least one form of the invention,

such as that which follows, it is, of course, the purpose of a patent to cover each new inventive concept therein no matter how it may later be disguised by variations in form or additions of further improvements; and the appended claims are intended to accomplish thi purpose by particularly pointing out the parts, improvements or combinations in which the inventive'concepts are found.

In the illustrated form of the invention, the truck includes a movable body 12 comprising upstanding sides which move along a load-carry ing floor [3 whichin turn is supported by a frame I4 which may comprise part of the truck chassis.

The truck will generally be provided with the usual driver cab IS in which control mechanism 1 for the body may be located.

The movable body I2 is preferably reenforced' so as to be quite rigid. One of the features of the invention is that this movable body is strong and rigid enough to resist bulging by the load so that it may comprise the sole side Walls of the truck. At the same time, it need notbe so sturdy that it will alone carry the weight of the load because this is carried mainly by the immovable floor 13.

The truck side plates llmay be reenforced'by angle bars l8 and by horizontally disposed channel bars 19. The two sides of the truck body. are

held together by being rigidly and permanently secured to the front and back walls of the body, therebeing no need to swing open the back of the'truck for quick dumping. These end walls may be reenforced by suitable reenforcing means such as horizontally extending angle bars 2|. It will be understood that .all of the parts of the movable body above mentioned maybe rigidly se-.

f riction bearings preferably being provided. The

rollers 23 arechiefly provided to avoid excessive The rollers 23 a friction when the truck body is overhanging the frame M, as seen in Fig. 2. As the truck body l2 approaches its load-carrying position, its weight will rest more and more on the loadcarrying floor l3. As a matter of fact, it is advantageous to have the bottom of front end plate 26 slide or approximately slide along the floor l3 so that it will scrape the floor fairly clean as it dumps the load. 7

Suitable additional rollers may be provided for ensuring reasonably smooth and easy movement Dumping mechanism ,The body is moved toward the dumpin :position by two Side cables "3| and is "returnedby a central cable 32. 'The dumping movement "requires theapplication of much more force. Each of the cables "3], wm'chma belof .steel, is wound on ad'ruini33. seen'be'st'frdni Fig. 8, eachfcable 3| extna from the T33Lafroimd astaeonar 30 I this sheave the'cable 31 extends around sheave sheave 1.34 rotatably carried by'bracket'3'6. From 31"rotatably carrie by the channn member's a, and back "to an anchor 111g 3 8. Preferably the cable"3 I is secured by means of an adjustment device 139, so that thetension' on the two side cables3l "may be equalized.

It will be apparent that the illustrated'apparatus' draws the body rearwardly with two "strands of each'cable '31, 'so that 'o'nly'half 6f the tension is rejquiredthat 'woiild'bere'guired 'withoutthe sheavei31. p

The mechanical advantage resmtin from the sheave 31 is not required for the return f movement of the body because only the body without a load needs to be moved. Accordingly, the "return cable 372 may be woun'd direc'tly'ion mum-i4 l This drum" "has a circumference'hali'ofthe circumference of the: drums33 because mediums 33 must" pay out cable 31 twice as fast "as cable 32 is wound -'on'qr.um 4 l.

The drums 33' and?! l are all rigidly c'ai'rie'd'by shaft 43 'wh'ic'hf'is' driven throughe gear boxl'd by a sprocket "46, chain 41, sprocket; ldrive shaft 49, and power take-01f unit which may be'mounted onthe' trucks transmission caseTSZ sense that no amount of force applied to a' cable 3|- or-32' 'will=-be-able to'turn"theshaft'43 unless the'worm is-driven by sprocket 46.

It will be apparent that-"when'the 'shaft' 4.3is driven in one direction; the drums 33 willwind cables-3| to dump the load while cable32 is'paicl Thus one or more pairs trol rod 51 rearwardly, hand lever 56 being piv oted to a frame member 58. This connects the gears in power take-off unit 5| in a manner to drive shaft 43 in a direction for winding cables 3| on drums 33, thus dumping the load. As the movable body I2 approaches the limit of its rearward movement, a control arm 59 thereon strikes a projection 6! on control bar 62. This bar is slidably carried by-stationary brackets :63 and is mechanicallycoupled to ro'di'l through crank assembly 65 so as to restore the control lever 56 to neutral position and discontinue the driving of f shaft :43.

"forwardly to engage the gears of take-off unit 51 When the load has been dumped, the hand lever 'issWun'g-rearWardIy, shifting control rod 51 .with .the'loppoSiteldirection of drive, thereby drivperfect use .of the invention than others. "Other so.

out. When the shaft- 43 is'driven in the other direction, the drum 4| will wind cable 32"to re-' turn the movable bodylZto-the load-carrying position while cab1es3l are 'paid 'out.

The control of the drive of shaft 43 is-i-n-itialiy executed through hand lever-56. "Byswing i-ng it forwardly from a central position, it shif'ts 'eon- "drum 41.

.gopemtion fFrbintheforegoingit"isapp'arent that'in orlder to lduinp the 'ljoad'fro'm the truck, the hand "lever 56 isimov'ed in one direction to drive shaft "'43 in .a"direjcti0r1" to drive cablessl Jon" drums f.3-3,"thus drawing the sheave f 31', and "with it the truck body I 2, irea'rwardly. Inasmuchas .the movable body I 2 includes ndfioorfthe front fend plate-2 6 of'the movable bodysli-des' the 'contents ofth'e truck across the rear end of the truckfloor '13, thus dumping the" truck. 'The rearvi ard"move.- ment is';'alltoin ati ,allyterminated warm-"swe rried by the .m'ovab'le"'body istriking'proj ection "61 to restore the (drive mechanism to neutral. "The truck'b'ody is restored to loadcarrying position by shifting lever in" the opposite ."direction to rotate shafti'4'3 in ajdirection'to wind cable' 32 on drum"4 I ,thus drawing themovable'body -i2 forwardly until the arm" 59 strikes the projectiont l to restore' thedrive 'mechanismto neutral.

"Withithis' truck it is' easy tospread ,a uniform layer as in the case ofispreading. ,gravel along a road, for't'example. "Fo jthis Pu pose it is merel necessaryto throw thehand lever 56"in' "a direction to "produce dumping and drive the truck forwardlyat'a slow uniform speed. The uniform power take bfifland drive mechanisms "could Joe substituted. Some other flmeohanicaliadvafitage device could be' used'in place of theiblock and tackle arrangement- Some body-movingiinechanism other than cablescould be used including for example, a "'fiuidcylinder or a rack andfpinion. The"details"of ithe body'construction could be widely"'varied. The "loodyjm'mldv be shifta'bly supported m different ways. The support" rollers could all be "carried by "the body'and run :on a stationary member.

What is claimed is: I p

1. A'dump' vehicle; including "a chassis; ajload floor carried by the v chassis; a movable: body .including up'sta-nding "opppsed sidewalls' and" 0pposed front arid back walls rigidly secured to "One another :iand, each provid with ion it'iidibodyi toget r with a oad"rtaiiiedthereia aloha u'filcient'iln stiffening formations to; b v the loci floor-'to-dump the load off an dge" off-2' sisting" spread in 'transp rig the load; said the lQQQfiQbI lhllldiIl drum surfaces, a cable movable body being 'shiftablys pported in aposiwound on one surface for drawing the tion above the load floor to ain a load thereon, 5 iii-body from the, extended po sition to the load-' each said side wall comp': the sole sidewall carrying position, cable means-Wound 1n the 011- on its side of the truck body, and means for posite'idirectioni on:'at ;least-,;.onedrum-surface shifting said movable body, together with a load rotatable in fixed relation to: ;the.;;firs.t-name:i

retained therein, along the load floor to dump the load off an edge of the load floor.

2. A dump vehicle including a chassis, a load floor carried by the chassis, a movable body shiftti 1 r n W ably positioned above the load floor and includoad; adrive "mechanism-for" v ing upstanding opposed and rigidly spaced side drum means at will to be driven by the V c walls and a front wall constructed to retain a engine to Produce either movement; ac load on the floor, means for sliding said movable device operable by the body as the body reaches body, together with a load retained therein, along either extreme position for disconnecting the the load floor to dump the load off the rear edge drive mechanism from the en eof the load floor, and pairs of spaced rollers 6- A dump vehicle including a C s a load longitudinally spaced in fixed positions on opfloor carried by the chassis, amovable body shiftposite sides of the body near the rear edge of ably positioned a v the d oo a d includsaid floor, and tracks on the side Walls engaging ing upstand pp d nd r d y spac d side the rollers for supporting the overhanging part of Walls and a front wall constructed to retain a the body as it projects beyond the load fl r i load on the floor, means for sliding said movable dumping the load, said body being in sliding en- 2 b dy, together w a l in d t i al ne gagement with said floor forwardly of the rollers, the load floor to dump the load ofi an edge of said tracks being positioned to engage the underthe load floor, including drum surfaces, a cable side of the forward rollers as the overhanging wound on one drum surface for drawing the body part of the body tends to rock the body on the from the extended position to the load-carrying rear rollers. position, and block and tackle apparatus op- 3. A dump vehicle including a chassis, a load erated by at least one drum surface for moving floor carried by the chassis, a movable body shiftthe body from the load-carrying position to the ably positioned above the load floor and in-cludextended position for dumping the load, and a i upstanding pp a d y Spaced Side drive mechanism for said drum surfaces to prowalls and a front wall constructed to retain a load e either movement, and a control device op- On e floor, means for sliding said m v b body, erable by the body as the body reaches either together With a load retained therein, along the extreme position for rendering the drive mechload floor to dump the load off the rear edge of anism inactive the load floor, and pairs of spaced rollers spaced 7 A dump Vehicle including a chasss, a load in fixed positions on opposite sides of the body flo r carried by the chassis a movable body near t rear edge and tracks slde Walls shiftably positioned above the load floor and inengagmg the rollers for supporting the overeluding upstanding opposed and rigidly Spaced hangmg part the W as It prolects side walls and a front wall constructed to retain h load 9 m dumpmg the load Sald body a load on the floor, means for sliding said mov- Shdmg on 5 floor iorwardly of the rollers and 5 able body together with a load retained therein rollers carried by said body near the front end along the load floor to dump the loa d off an g the i 5: positioned uilder g floor to hold edge of the load floor said means including drum e from of e body close 0 the cor.

surfaces, means for driving the drum surfaces A dump Vehicle Including chassls load jointly in either direction at will, a cable on one floor carried by the chassis, a movabe body shiftably positioned above the load floor and including Egg 221;; g g x: gsgjgggg gg ggi gfi' upstanding opposed and rigidly spaced side walls and a, front wall constructed to retain a load on cab1e.means. m on at least one drum the floor, means for sliding said movable body, toface In dufictlon to be wound the first named cable is unwound for moving the body gether with a load retained therein, along the 5 load floor to dump the load ofi an edge of the 5 from the load-carrying position to the extended load floor including drum Surfaces, a cable position for dumping the load, and a control dewound on one drum urfa e f r drawing the vice operable by the body as the body reaches body from the extended position to the loadeither extreme Positi n for disconnectin the carrying position, and block and tackle apparatus drive meansoperated by at least one drum surface for mov- A p Vehicle i luding a chassis, a load ing t body from t 10ad carry1ng position t floor carried by the chassis, a movable body inthe extended position for dumping the load, and eluding upstanding opposed side wells and pa drive mechanism for connecting the drum posed front and back Walls dly ecured to means t 111 t be driven by t vehicle engine one another and each provided with longitudinal to produce either movement; and a control device stiffening formations to be Self-Sufficient in op rable by t e body, as the body reaches it sisting spread in transporting the load, rollers on extreme position for disconnecting t drive opposite sides of the load floor near the rear edge mechanism from t engine, thereof for at least partially supporting the mov- 5, A dump vehide including chassis load able body in a position above the load floor to floor carried by the chassis, a movable body shiftretain a load thereon, Said longitudinal stiffenably positioned above the load floor and includn formations f r tra ks f r r l ng n said ing upstanding opposed and rigidly spaced side rollers, each said side wall comprising the sole walls and a front all constructed to retain a side wall on its side of the truck body, a d means load on the floor, means for sliding said movable for shifting said movable body together with a marmtainnd mlamimalmeatm lqa llqmzmiqumn 1 the mazd qfi he max-i edgm mass" Certificate of Correction Patent No. 2,515,334 July 18, 1950 STANLEY M. BUYE ET AL.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows:

Column 6, line 39, for chases read chassis; line 49, after the Word cable insert wound;

and that the said Letters Patent should be read as corrected above, so that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 14th day of November, A. D. 1950.

THOMAS F. MURPHY,

Assistant Gommz'ssz'oner of Patents. 

